#define MAXPTR 0x7fffffff /* max value of any pointer variable */
#define INCH 240 /*increments per inch*/
#define SPS INCH/10 /*space size*/
#define SS INCH/10 /* " */
#define PO 0 /*page offset*/
#define DTAB 0 /*set at 8 Ems at init time*/
#define INCH 432 /*troff resolution*/
#define SPS 20 /*space size at 10pt; 1/3 Em*/
#define SS 12 /*space size in 36ths of an em*/
#define TRAILER 6048 /*144*14*3 = 14 inches*/
#define PO 416 /*page offset 26/27ths inch*/
#define TEMP 512 /*128K*/
#define NARSP 0177 /*narrow space*/
#define HNSP 0226 /*half narrow space*/
#define PS 10 /*default point size*/
#define FT 0 /*default font position*/
#define LL 65*INCH/10 /*line length; 39picas=6.5in*/
#define VS INCH/6 /*vert space; 12points*/
#define NN 132 /*number registers*/
#define NNAMES 14 /*predefined reg names*/
#define NIF 15 /*if-else nesting*/
#define NS 64 /*name buffer*/
#define NTM 256 /*tm buffer*/
#define NEV 3 /*environments*/
#define EVLSZ 10 /*size of ev stack*/
#define EVS 3*256 /*environment size in words*/
#define NM 300 /*requests + macros*/
#define DELTA 512 /*delta core bytes*/
#define NHYP 10 /*max hyphens per word*/
#define NHEX 128 /*byte size of exception word list*/
#define NTAB 35 /*tab stops*/
#define NSO 5 /*"so" depth*/
#define WDSIZE 170 /*word buffer size*/
#define LNSIZE 480 /*line buffer size*/
#define NDI 5 /*number of diversions*/
#define DBL 0100000 /*double size indicator*/
#define MOT 0100000 /*motion character indicator*/
#define MOTV 0160000 /*clear for motion part*/
#define VMOT 0040000 /*vert motion bit*/
#define NMOT 0020000 /* negative motion indicator*/
#define MMASK 0100000 /*macro mask indicator*/
#define ZBIT 0400 /*zero width char*/
#define IMP 004 /*impossible char*/
#define HX 0376 /*High-order part of xlss*/
#define LX 0375 /*low-order part of xlss*/
#define NTRAP 20 /*number of traps*/
#define NPN 20 /*numbers in "-o"*/
#define T_PAD 0101 /*cat padding*/
#define T_IESC 16 /*initial offset*/
#define NPP 10 /*pads per field*/
#define FBUFSZ 256 /*field buf size words*/
#define OBUFSZ 512 /*bytes*/
#define IBUFSZ 512 /*bytes*/
#define NC 256 /*cbuf size words*/
#define NOV 10 /*number of overstrike chars*/
#define ZONE 5 /*5hrs for EST*/
#define PAIR(A,B) (A|(B<<BYTE))
#define BLK 128 /*alloc block words*/
#define NBLIST BIG /*allocation , BIG = 256 per 65k*/
#define BLKBITS 7 /*for BLK=128*/
#define NBLIST TEMP /*allocation list, TEMP<=512*/
/* BLK*NBLIST<=65536 words, if filep=unsigned */